Method of making hot-water bottles, douche bags, etc.



April 1927' F. T. ROBERTS METHOD OF MAKING HOT WATER BOTTLES DOUCHE BAGS, ETC

3 Sheets-Sheet 1 Filed April 18, 1925 FIG:- 5

Apr 1927' T. ROBERTS METHOD OF MAKIQG HOT WATER BOTTLES. DOUCHE BAGS Filed April 18, 1925 ETC 3 Sheets-Sheet 2 F. T. ROBERTS METHOD OF MAKING HOT WATER BOTTLES, DOUCHE BAqs, ETC

April 19,1927. T 1,625,395

Filed April 18. 1925 v s Sheets-Sheets 4F.- 9 3710611 loz wwil wwwlzd 61m: Ur

Patented Apr. 19, 1927.

FRED THOMAS ROBERTS,

BER CONSOLIDATED INC., 015 TUCKAHOE, NEW YORK,

WARE.

OF YONKEBS, NEW YORK, ASSIGNOR TO PARAMOUNT BUB- A CORPORATION OF DELA- METHOD OF MAKING HOT-WATER BOTTLES, BOUCHE BAGS, ETC.

Application filed April 18, 1925. Serial No. 24,051.

One of the difiiculties heretofore experienced in the manufacture of rubber hot water bottles has been effectively joining the sheets after vulcanization, in case they are separated for the removal of a core, or in effectively securing the filling ferrule in place, if the core is withdrawn through the neck opening. To overcome these difliculties, I have invented and patented (Patent 1,310,439) a method of making hot water bottles wherein the sheets are seated in mold cavities by suction and thus no core is necessary. There has remained however some trouble in joining the metal ferrule to the neck; particularly there has been a tendency for the rubber surrounding the threaded ferrule to spread over the top edge of the ferrule and thereby to prevent the attainment of a proper seat when the stopper is turned in to close the bottle. This is especially true in connection with the manufacture of bottles wherein a mass of rubber is interposed between the ferrule and the sheets which serve to form the body of the bottle.

The object of the present invention is the provision of a method for making hot water bottles so as to overcome the difiiculties mentioned, and enable the rapid manufacture of the bottles, with a minimum number ofseconds. In this connection I employ a modification of my former suction method which I now carry out with the aid of certain auxiliary steps herein described. An advantage of the present method is that it enables the filling funnel to be of heavier rubber stock, so that it may better hold its shape in use.

The preferred means for carrying out my invention is illustrated in the rawings,

' wherein Fig. 1 is a plan view illustrating a bottom mold member having a sheet of rubber placed over the cavity therein; Fig. 2 is a view illustrating a partially formed article commonly termed a biscuit together with the sheets from which the biscuit is formed; Figs. 3 and 4 are sections taken at the places indicated by the lines 33 and 14: in Fig. -1 and showing part of the forming molds; Fig. 5 is a view showing the neck portion of the bottle after the forming operation; Fig. 6 is a plan view showing a section of rubber which may be employed for making the funnel-shaped mouth of a bottle; Fig. 7 is a side View of the bottle having the section of rubber indicated in Fig. 6 attached thereto; Fig. 8 is a plan view of a bottom curing mold member showing a partially formed bottle therein with a section through the mandrel; Fig. 9 is a section taken on a plane ndicated by the line 9-9 in Fig. 8; Fig. 10 is a section taken through the neck portion of a-coniplete article.

I have shown the forming molds as comprising a lower mold section 10 and a cooperating upper mold section 11, which are arranged to be brought together in the usual manner. The section 10 is illustrated as having passageways 12 which. lead to a coinnon passageway 13 while the upper section is shown as having spaced passageways 14 which lead to a common passageway 15. Suction lines are attached, as at 16 and 17 respectively, for enabling vacuum to be proilipced in their respective passageways 13 and The vacuum within the passageways is employed for seating sheets of rubber stock within the respective mold sections. For example, sheet A on section 10 is laid entirely across the cavity therein and sheet 13 is laid across section 11 while the mold is open. Then the vacuum is applied, the sheets are drawn down so as to fill the cavities in the usual manner. Before the mold sections are brought together, however, a threaded ferrule 20 having a mass of semicurcd rubber 21 about it and across its inner end, is placed upon the sheet A adjacent the neck of the bottle as shown in Fig; 3. The end portion of the rubber ferrule-sheath may be set back away from the ferrule, as shown at 22. A small quantity of water or other heat-expansible substance is placed in the body portion of this rubber lined cavity in the mold section 10.

Now the mold section 11 is brought into engagement with the mold section 10 so as to join the sheets A and B and to sever the biscuit therefrom. This is effected by the use of raised beveled ribs or cutting edges 25 and 26 on the mold sections 10 and 11 respectively. These cutting edges extend nearly around the marginal edges of the cavities so that the joining of the two sheets as well as their severance from the adjacent rubber is accomplished in a single operation.

After the forming operation is completed and the forming mold is open, then the biscuit C, as shown in Fig. 2 may be lifted from the sheets except for the connection D beyond the neck of the biscuit. The rubber adjacent the point D may then be cut so as to remove the biscuit entirely from the sheets whereupon the edges are trimmed closely flush with the shoulder 22, as shown by the full lines in Fig. 5.

To make the funnel part of the bottle, I take a se mental section of semicured rubher 30 (Fig. 6) which may well be of thicker stock and is of the desired shape so that it may form a hollow cone when itsradial edges 31 abut. These edges are abutted and cemented and then the bottom edge 32 1s cemented to the edge of the biscuit shownln Fl 5.

lifter the section 30 is cemented to the body portion, then a threaded head 40 on a spindle 41 is turned into the ferrule 20. Then the spindle is inserted through an opening 42 in the mandrel 43 whereupon the body with the mandrel 1s laid within the lower section of the vulcanized mold.

hen the top section 51 of the mold is brought into engagement with the lower section and clamped thereto, then a wing nut 44 may be tightened upon the spindle 41 to force the annular end face 45 of the mandrel into the rubber between the ferrule and the body of the bottle. The mandrel may be prevented from rotating during such turning of the wing nut by fins 47 whlch enter grooves in the mold sections.

The osition of the parts as described efl'ective y holds the funnel between the mandrel and mold, holds the neck portions of the bottle in snug engagement with the funnel, and insures the rubber around the ferrule being held back from the edge thcreof. The mandrel remains in place during the vulcanizing operation, and insures proper final form for the funnel and neck portions of the article. The body portion is given proper form by the external mold against which the body sheets are pressed by the internal gas pressure generated by the vulcanizing heat.

After the vulcanizing step is completed, the mandrel as well as the spindle is removed, then the rubber 21 adjacent the opening 46 in the ferrule may be pierced to make the interior of the bottle accessible.

It will be understood that in carrying out my operation, the metal ferrules are first covered on this outer threaded surface and across the inner end with raw rubber, and then placed in a mold and heated only sufliciently to cause the rubber to hold its shape. The segmental conical section is likewise previously died or out from partly cured stock which will hold its shape during the operation. If desired, this segmental piece may have a supporting tab portion 35, and the mandrel may be recessed to receive it, :1

cooperating lug on the curin mold 50 serving to insure a hole 36 in the nished article. I prefer to so form the neck segment (as shown) that the seam where the radial edges meet is coincident with the vulcanizing fin formed by the mold sections 50 and 51 and is thus obliterated when the fin is buffed off.

Experience has demonstrated that the method described results in an effective junction of the neck and bod and an effective connection. between the ferrule and body. Moreover, the upper edge of the ferrule is left free so as to permit an effective seal to be made whenever a stopper is inserted therein.

I claim:

1. The method of making hot water hottles and similar articles comprising forming the body of the article about a ferrule embraced by a sheath of plastic stock with the body overhanging the ferrule, severing the portion of the body beyond the ferrule sheath, then 211))1 ing material for a funnel at the end of the trimmed body.

2. The method of making hot water bottles and similar articles comprising seating sheets of plastic stock in two cavitary molds for the body of the article, placing in one of the molds thus lined a ferrule surrounded by a body of plastic stock with the sheets extending in each direction beyond the ferrule, closing the molds to join the sheets together and join the ferrule sheath to the sheets, then removing the biscuit from the molds and thereafter severin the portion of the sheets beyond the ferru e sheath, then applying material for the funnel.

3. The method of making rubber hot water bottles and similar articles comprising seating by suction in two cavitary molds rubber sheets for the body of the article, placing in one of the rubber-lined molds, a ferrule surrounded by a body of rubber with the sheets extending in each direction beyond the ferrule, closing the molds to join the sheets together and join the ferrule sheath to the sheets, then removing the biscuit from the molds and thereafter severing the portion of the sheets beyond the ferrule sheath, then applying to the end of the biscuit a sheet rubber funnel, and vulcanizing the article.

4. The method of making hot water bottles and similar articles comprising seating in two cavitary molds, sheets for the body of the article placing in one of the lined molds, a ferrule surrounded by a body of plastic material with the sheets extending in each direction beyond the ferrule, closing the molds to join the sheets together and join the ferrule sheath to the sheets, severing the portion of the sheets beyond the ferrule sheath, then applying a funnel portion which abuts the cut-off end of the sheets about the ferrule sheath, and vulcanizing the article in a mold embracing the body and funnel with a mandrel extending into the funnel.

5. The method of making hot water bottles and similar articles consisting of seating b suction sheets of rubber for the body oft e article in cavitary molds, hav ng their cavities embraced b raised cutting edges, placing within one 0 the'rubber-lmed molds a ferrule surrounded by plastic stock, bringing the mold members together to 10 n the sheets to the ferrule sheath and to oin them together and at the same time out off the surplus stock beyond the cuttmg edges, then removing the biscuit from the mold, cutting off the rubber sheets beyond the ferrule sheath and applying sheet rubber for a funnel, abutting the ends of such body sheets, and vulcanizing the article.

6. The method of making hot water bottles and similar articles comprising forming the body of the article about a ferrule surrounded by plastic materlal which extends completely across the lnner end of the ferrule to close it, vulcanizing the art cle with internal fluid pressure, and perforating the ferrule sheath on the inner side of the ferrule.

7. The method of making hot water bottles and similar articles comprising seating rubber sheets for the body of the article in two cavitary molds, placing Within one of such rubber-lined molds a ferrule surrounded by plastic material which extends completely across the inner end of the ferrule to close it, bringing the mold members together to join the two sheets to each other and to join such sheets to the ferrule sheath, vulcanizing the article, and perforating the ferrule sheath on the inner side of the ferrule.

8. The method of making hot water bottlts and similar articles comprising seating plastic sheets for the body of the article by suction in two cavitary molds, placing within one of such lined molds a ferrule surrounded by plastic material which extends completely across the inner end of the ferrule to close it, bringing the mold members together to join the two sheets to each other and to join such sheets to the ferrule sheath, removing the biscuit from the mold, cutting off the surplus sheet rubber beyond the ferrule sheath, applying a funnel-shaped portion of sheet material in place of such cutoff material, and perforating the seal across the inner end of the ferrule.

9. The method of making hot water bottles and similar articles comprising forming the body of the article about a ferrule surrounded by a plastic sheath, and curing the article while supplying pressure to the end of the ferrule sheath to force it away from the end of the ferrule.

10. The method of making hot Water bottles and similar articles comprising seatmg in cavitary molds sheet rubber for the bod of the article, placing within one of the rub er-lined molds, a ferrule surrounded by a rubber sheath, brin 'ng the mold members together to join the s eets to each other and to the ferrule sheath, and vulcanizing the article while supplying pressure to the end of the ferrule sheath to force it away from the end of the ferrule.

11. The method of making hot water bottles and similar articles comprising forming in a mold a biscuit about a ferrule surrounded by a plastic sheath, removing the biscuit from the mold, cutting off the surplus stock, so plying a conical-shaped oxtension for a unnel, and curing the article while supplying mechanical pressure against the end of the ferrule sheath surrounding the entrance to the ferrule.

. 12. The method of making hot water bottles and similar articles comprising forming a biscuit of sheet stock about a ferrule surrounded by plastic stock, then cutting off the biscuit beyond the ferrule sheath and applying sheet material for a funnel, which material is of greater thickness than the sheets of the body and abuts the ends of such body sheets.

13. The method of making rubber hot water bottles and similar articles comprisng seating stock for the body of the article m a pair of cavitary molds having their cavities embraced by raised cutting edges, placmg a mass of rubber about the side surface of a metal ferrule, semi-curing such sheathed ferrule, placing such semi-cured article in one of the rubber-lined cavities, bringing the mold members together to join the parts and cut off the surplus stock, removing the formed biscuit from the mold, then cutting off the excess of sheet rubber beyond the ferrule sheath, applyin thicker stock in a hollow conical form, abutting the ends of the rubber sheets, then vulcanizing the complete article in an embracing curing mold while supplying outward mechanical pressure in the funnel.

14. The method of making hot water bottles and similar articles comprising seating sheet stock for the body of the article in cavitary molds, placing within one of the rubber-lined cavities a ferrule having a sheath, bringing the mold members together to join the sheets together and join them to the sheath, removing the biscuit from the mold, cutting off the surplus sheets beyond the ferrule sheath, then taking a segmental piece of rubber with substantially radial edges, joining such radial edges together to make a funnel-shaped part and joining the inner edge of such funnel-shaped part to the biscuit, and vulcanizing the article in a vulcanizing mold.

15. The method of making hot water bottles and similar articles comprising forming a biscuit for the body of the article sur rounding a ferrule having a sheath, cutting off the surplus sheets beyond the ferrule sheath, then taking a segmental piece of rubber with substantially radial edges, joining such edges together to make a funnel'shapcd part and joining the inner edge of such funnel-shaped art to the biscuit, the radial edges of suc 1 funnel-shaped piece being located at one side of the article, and vulcanizing the article in a vulcanizing mold having its plane of separation coincident with the line of junction at the radial edges of the funnel.

16. The method of making hot water bottles and similar articles comprising seating stock for the body of the article in a pair of cavitary molds having their cavities embraced by raised cutting edges, placing a mass of rubber aboutthe side surface and across the inner end of a metal ferrule, semicuring such sheathed ferrule, placing such semi-cured article in one of the rubber-lined cavities, placing a heat expansible substance in one of the rubber-lined cavities, bringing the mold members together to join the parts and cut off the surplus stock,removing the formed biscuit from the mold, then cutting off the excess of sheet rubber beyond the ferrule sheath, applying stock in a hollow conical form abutting the ends of the rubber sheets, then vulcanizing the complete article in an embracing curing mold while supplying outward mechanical pressure in the funnel and inward mechanical pressure against the end of the sheath, the substance within the bottle supplying fluid outward pressure within the body.

In testimony whereof, I hereunto aiiix my signature.

FRED THOMAS ROBERTS. 

